12,525 research outputs found
The Politics of Institutional Learning and Creation: Bank Crises and Supervision in East Central Europe
This article examines the political conditions shaping the creation of new institutional capabilities. It analyzes bank sector reforms in the 1990s in three leading postcommunist democracies – Hungary, Poland, and the Czech Republic. It shows how different political approaches to economic transformation can facilitate or hinder the ability of relevant public and private actors to experiment and learn their new roles. With its emphasis on insulating power and rapidly implementing self-enforcing economic incentives, the “depoliticization” approach creates few changes in bank behavior and, indeed impedes investment in new capabilities at the bank and supervisory levels. The “deliberative restructuring” approach fostered innovative, costeffective monitoring structures for recapitalization, a strong supervisory system, and a stable, expanding banking sector.http://deepblue.lib.umich.edu/bitstream/2027.42/40112/3/wp726.pd
Test ideals in diagonal hypersurface rings II
Let , where is a field of
characteristic , does not divide and . We describe a
method for computing the test ideal for these diagonal hypersurface rings. This
method involves using a characterization of test ideals in Gorenstein rings as
well as developing a way to compute tight closures of certain ideals despite
the lack of a general algorithm. In addition, we compute examples of test
ideals in diagonal hypersurface rings of small characteristic (relative to )
including several that are not integrally closed. These examples provide a
negative answer to Smith's (2000, Comm. in Alg.) question of whether the test
id eal in general is always integrally closed.Comment: revised version, incorporating referee's comments, LaTeX, 10 page
The Politics of Institutional Learning and Creation: Bank Crises and Supervision in East Central Europe
This article examines the political conditions shaping the creation of new institutional capabilities. It analyzes bank sector reforms in the 1990s in three leading postcommunist democracies – Hungary, Poland, and the Czech Republic. It shows how different political approaches to economic transformation can facilitate or hinder the ability of relevant public and private actors to experiment and learn their new roles. With its emphasis on insulating power and rapidly implementing self-enforcing economic incentives, the “depoliticization” approach creates few changes in bank behavior and, indeed impedes investment in new capabilities at the bank and supervisory levels. The “deliberative restructuring” approach fostered innovative, costeffective monitoring structures for recapitalization, a strong supervisory system, and a stable, expanding banking sector.Institutional change, transition economies, bank crises, bank supervision, learn
Optimal payload rate limit algorithm for zero-G manipulators
An algorithm for continuously computing safe maximum relative velocities for two bodies joined by a manipulator is discussed. The maximum velocities are such that if the brakes are applied at that instant, the ensuing travel between the bodies will be less than or equal to a predetermined amount. An improvement in the way this limit is computed for space manipulators is shown. The new method is explained, test cases are posed, and the results of these tests are displayed and discussed
Acoustic Supercoupling in a Zero-Compressibility Waveguide
Funneling acoustic waves through largely mismatched channels is of
fundamental importance to tailor and transmit sound for a variety of
applications. In electromagnetics, zero-permittivity metamaterials have been
used to enhance the coupling of energy in and out of ultranarrow channels,
based on a phenomenon known as supercoupling. These metamaterial channels can
support total transmission and complete phase uniformity, independent of the
channel length, despite being geometrically mismatched to their input and
output ports. In the field of acoustics, this phenomenon is challenging to
achieve, since it requires zero-density metamaterials, typically realized with
waveguides periodically loaded with membranes or resonators. Compared to
electromagnetics, the additional challenge is due to the fact that conventional
acoustic waveguides do not support a cut-off for the dominant mode of
propagation, and therefore zero-index can be achieved only based on a
collective resonance of the loading elements. Here we propose and
experimentally realize acoustic supercoupling in a dual regime, using a
compressibility-near-zero acoustic channel. Rather than engineering the channel
with subwavelength inclusions, we operate at the cut-off of a higher-order
acoustic mode, demonstrating the realization and efficient excitation of a
zero-compressibility waveguide with effective soft boundaries. We
experimentally verify strong transmission through a largely mismatched channel
and uniform phase distribution, independent of the channel length. Our results
open interesting pathways towards the realization of extreme acoustic
parameters, and their implementation in relevant applications, such as
ultrasound imaging, sonar technology, and sound transmission
Hybrid Atom--Photon Quantum Gate in a Superconducting Microwave Resonator
We propose a novel hybrid quantum gate between an atom and a microwave photon
in a superconducting coplanar waveguide cavity by exploiting the strong
resonant microwave coupling between adjacent Rydberg states. Using
experimentally achievable parameters gate fidelities are possible on
sub-s timescales for waveguide temperatures below 40 mK. This provides a
mechanism for generating entanglement between two disparate quantum systems and
represents an important step in the creation of a hybrid quantum interface
applicable for both quantum simulation and quantum information processing.Comment: 4 pages, 4 figure
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